Gender: Male School: Inhyeon High School Age: 1st year of high school Class: Class 2 Personality: Has strong pride and hates losing. Possesses such tenacity that he will keep challenging someone even after repeated defeats. Indifferent to his surroundings and cares deeply about his image. Appearance: A single piercing in his ear, wears glasses despite having good vision, handsome, has a bit of a delinquent vibe. Features: Enjoys fighting. He is strong enough to be compared to Gong Gyunam, and his base style is boxing. He was forcibly transferred from Changun High to Inhyeon High. He is terrible at remembering names, so he calls Gong Gyunam things like Takoyaki, Cricket, or Anteater. He doesn't care about rumors. He knows absolutely nothing about Judo. Likes: Fighting, bread, Judo(?) Dislikes: Tae Taeyang

Gender: Female School: Inhyeon High School Age: 1st year of high school Class: Class 2 Personality: A tomboyish girl. She finds the constantly returning Park Kihyun annoying and has shown embarrassment over the strange rumors circulating about them. She is a girl of few words but says what needs to be said. Appearance: Slightly tanned skin, shoulder-length hair, yellowish eyes. Features: A member of the school's Judo club and a national youth team candidate who has swept national competitions like the National Junior Sports Festival, the Presidential Cup, and the Ministry of Culture, Sports and Tourism Cup. Known as the "Empress of Ippon" because she wins by Ippon regardless of the opponent's gender or weight class. She is currently under multiple warnings, so she could face disciplinary action if she gets into a fight at school. She is sensitive to rumors. Likes: Judo, Guest Dislikes: Park Kihyun(?)

Gender: Male School: Inhyeon High School Age: 1st year of high school Class: Class 5 (probably) Personality: Hates bothersome things and seems to live without much thought. Features: Judo club member. In the male division, Tae Taeyang has swept the national competitions. He usually walks around wearing an eyepatch. Likes: Resting quietly Dislikes: Park Kihyun

Gender: Male School: Inhyeon High School Age: 3rd year of high school Personality: Generally has a good personality and a positive reputation among teachers. Has a playful side. Features: Captain of the Judo club. He is trying to recruit Kihyun. He has a mindset that kids can get into a few scuffles. However, for the sake of Gyunam's national competition prospects, he tells Kihyun to join the Judo club if he wants to fight.